Prepn of porous light ceramic grain with natural river sand and its application |
Title： |
| Prepn of porous light ceramic grain with natural river sand and its application |
|
Application Number： |
02103874 |
Application Date： |
2002/04/05 |
Announcement Date： |
2002/10/16 |
Pub. Date： |
|
Publication Number： |
1374275 |
Announcement Number： |
1174936 |
Grant Date： |
2004-11-10 |
Granted Pub. Date： |
2004-11-10 |
ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
B01D 39/20, C04B 38/00, C04B 38/06 |
Applicant(s)： |
Tsinghua Univ. |
Inventor(s)： |
Pan Wei, Cao Zhenzhu, Luo Yongming |
Key Words： |
Prepn, porous, light, ceramic grain, natural river sand, application |
Abstract： |
The present invention belong to the field of material technology and features that river sand containing SiO2 50-75 wt% and Al2O3 5-20 wt% as main material is ground, mixed with carbon powder and SiC in the proportion of 100 to 3-6 to 1-6 to obtain the mixture; and the mixture is mixed with water, ball milled and stoved, formed into 0.5-2 cm size grains after mixed with water, stoving at 80-100 deg.c, instering at 400-500 deg.c baking at 1000-1100 deg.c and cooling with the stove to produce the porous ceramic grain. The porous ceramic grain has apparent density of 0.7-1.2 g/cu cm, compressive strength of 5-20 MPa and wide filtering range, and is especially suitable for use in large water area with serious pollution. |
Claim： |
|
Priority： |
|
PCT： |
|
LegalStatus： |
|
Relevancy information
